The freelancers „fuck you, pay me“ is based on very clear contracts and respectful communication, even when things go bad. This is not what’s happening here AFAICS.
The minimum payout is subject to various conditions — for example, not being a duplicate. The author did not meet those conditions, and resorted to personal attacks instead of keeping things professional.
Uber has many, many problems as a company, but on this matter I can't say they're in the wrong.
Once they have shadowbanned the author, IMO, any attempt at respectfulness is violated by bug bounty organizers.
Maybe there are things more rude than shadowban, but I'm not aware of such.